4D sequential actuation: combining ionoprinting and redox chemistry in hydrogels

作者：Baker Anna B; Wass Duncan F; Trask Richard S

来源：Smart Materials and Structures, 2016, 25(10): 10LT02.

DOI：10.1088/0964-1726/25/10/10LT02

• hydrogels
• ionoprinting
• actuators
• sequential actuation
• selective redox

The programmable sequential actuation of two-dimensional hydrogel membranes into three-dimensional folded architectures has been achieved by combining ionoprinting and redox chemistry; this methodology permits the programmed evolution of complex architectures triggered through localized out-of-plane deformations. In our study we describe a soft actuator which utilizes ionoprinting of iron and vanadium, with the selective reduction of iron through a mild reducing agent, to achieve chemically controlled sequential folding. Through the optimization of solvent polarity and ionoprinting variables (voltage, duration and anode composition), we have shown how the actuation pathways, rate-of-movement and magnitude of angular rotation can be controlled for the design of a 4D sequential actuator.

• 出版日期2016-10